题目
题型:单选题难度:简单来源:湖北模拟
A.{2} | B.{1,2} | C.{1,2,3,4} | D.{1,2,3,4,5} |
答案
=({1,3,4,5}∩{2,3,4})∪{1,2}
={3,4}∪{1,2}={1,2,3,4}
故选C
核心考点
试题【设集合A={1,3,4,5},B={2,3,4},C={1,2},则集合(A∩B)∪C等于( )A.{2}B.{1,2}C.{1,2,3,4}D.{1,2,3】;主要考察你对集合运算等知识点的理解。[详细]
举一反三
4π2 |
5 |
(I)求集合A;
(Ⅱ)若B={x∈R|x2=πa},且B∩A=∅,求实数a的取值范围.
A.21 | B.8 | C.7 | D.6 |
A.{0} | B.{-3,-4} | C.{-4,-2} | D.φ |
A.(0,2) | B.[0,2] | C.{0,2} | D.{0,1,2} |